Backend

1. Improved Error Messages

   • Standardize and clarify error responses (e.g. use consistent formats for errors like UNAUTHORIZED, NOTE_NOT_FOUND, etc.) for easier frontend handling and debugging.

2. Clear Naming Conventions

   • Review and refine naming across endpoints, services, and models to ensure clarity and maintainability.

3. API Logging

   • Implement structured API logging to track request metadata (e.g. endpoints, payload, response status, user ID). This helps with debugging, monitoring, and auditing system behavior.

Frontend

1. Page Loading UX

   • Implement a proper loading state (e.g. spinner or skeleton UI) before rendering pages to prevent null reference errors and improve user experience.

2. Button Interaction Handling

   • Debounce or disable buttons temporarily after click to prevent duplicate API calls caused by rapid user interactions.

3. Form Validation & Feedback

   • Add detail user-friendly feedback messages to improve usability and reduce backend errors.

4. Special Error Code Handling

   • Handle specific HTTP error codes (e.g. 404, 500) using route-level middleware or centralized logic to display user-friendly error pages or fallback components instead of a blank page or message.

5. Responsive Design

   • Ensure the layout is fully responsive and optimized for various screen sizes, deliver the best viewing experience across all devices.